21151415112 has 64 divisors (see below), whose sum is σ = 56218769280. Its totient is φ = 6616676352.

The previous prime is 21151415083. The next prime is 21151415137.

21151415112 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21151415112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332233 + ... + 390744.

It is an arithmetic number, because the mean of its divisors is an integer number (878418270).

Almost surely, 2^21151415112 is an apocalyptic number.

It is an amenable number.

21151415112 is an abundant number, since it is smaller than the sum of its proper divisors (35067354168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21151415112 is a wasteful number, since it uses less digits than its factorization.

21151415112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723062 (or 723058 counting only the distinct ones).

The product of its digits is 400, while the sum is 24.

The spelling of 21151415112 in words is "twenty-one billion, one hundred fifty-one million, four hundred fifteen thousand, one hundred twelve".